CONTEXTS. 
Page. 
Introduction 7 
Work upon which this bulletin is based 9 
Possibility of increase of area of spotted fever 11 
Importance of the control of the spotted-fever tick 14 
Summary of facts bearing on importance of tick control 14 
Distribution of the spotted -fever tick 15 
Factors governing abundance 17 
Summary of life history of the spotted-fever tick 19 
The egg and larva 19 
The nymph 19 
The adult 19 
Seasonal history and habits 21 
The host animals of the spotted-fever tick 26 
Other species of ticks found in regions where Rocky Mountain spotted fever 
occurs 31 
Species of ticks which may play an important part in the dissemination of the 
disease should it be introduced into new regions 31 
Practical control or eradication of the spotted-fever tick 32 
Conditions favoring control 32 
Importance of control throughout the Bitter Root Valley 36 
Methods of destroying ticks 36 
Dipping 37 
Construction of vats 38 
Handwork in the destruction of the spotted-fever tick 41 
Definite recommendations for control or eradication of the spotted-fever 
tick in the Bitter Root Valley 41 
Estimated cost of work 42 
Supplementary means of control 43 
Necessity for expert supervision 44 
Bibliography of the more important writings on the spotted-fever tick 
5 
